Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
The pipe fills 1/6 of the tank per hour.
In 2 hours it fills 2/6 = 1/3.
Choose an option to check your answer.
Their combined rate is 1/8 + 1/12 = 5/24 tank per hour.
Time is 24/5 = 4.8 hours.
Choose an option to check your answer.
The net rate is 1/10 - 1/15 = 1/30 tank per hour.
Therefore, the tank fills in 30 hours.
Choose an option to check your answer.
The net hourly rate is 1/4 - 1/12.
This equals 2/12 = 1/6.
Choose an option to check your answer.
Three taps together have three times the rate of one tap.
One tap therefore takes 3 × 6 = 18 hours.
Choose an option to check your answer.
The remaining part is 3/4 of the tank.
At 8 hours per full tank, 3/4 takes 6 hours.
Choose an option to check your answer.
Daily wage equals total earnings divided by days worked.
Thus, 3,600 ÷ 12 = Rs. 300.
Choose an option to check your answer.
A's share is 3 out of 8 total parts.
Thus, A receives 3/8 × 4,800 = Rs. 1,800.
Choose an option to check your answer.
Total work is proportional to workers × hours × days.
So days = 8 × 6 × 15 ÷ (12 × 5) = 12.
Choose an option to check your answer.
Twenty-four workers complete 1/4 in 10 days, so the remaining 3/4 needs 30 equivalent days at the same workforce.
Only 20 days remain, requiring 36 workers, so 12 extra are needed.
Choose an option to check your answer.
In 5 days, A completes 5/20 = 1/4 of the job.
Therefore, 3/4 remains.
Choose an option to check your answer.
If half the work takes 6 days, the full work takes twice as long.
Thus, the total time is 12 days.
